Virtual controller of electromechanical characteristics for static power converters

a technology of electromechanical characteristics and static power converters, which is applied in the direction of adaptive control, electric generator control, instruments, etc., can solve the problems of disconnection of the grid, inability of conventional ph inverters to offer an appropriate support to the electric grid, and the failure of the grid of the inverter, so as to reduce the inertia of the power converter, facilitate the connection, and the effect of great flexibility in the behavior of the power converter

a technology of electromechanical characteristics and static power converters, which is applied in the direction of adaptive control, electric generator control, instruments, etc., can solve the problems of disconnection of the grid, inability of conventional ph inverters to offer an appropriate support to the electric grid, and the failure of the grid of the inverter, so as to reduce the inertia of the power converter, facilitate the connection, and the effect of great flexibility in the behavior of the power converter

US20140067138A1Inactive Publication Date: 2014-03-06ABENGOA SOLAR NEW TECH SA
2 Cites 36 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Virtual controller of electromechanical characteristics for static power converters
  • Virtual controller of electromechanical characteristics for static power converters
  • Virtual controller of electromechanical characteristics for static power converters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023]The controller of the virtual electromechanical characteristic for static power converters of the present invention comprises an electromechanical control loop that enables the online adjustment of parameters such as natural frequency, inertia, and damping factor, with the purpose of improving the operation of said power converter.

[0024]The electromechanical control loop proposed herein is governed by a closed loop transfer function relating the power delivered to the grid Pout and the input power into the converter Pin, which may be dynamically parameterized by means of a virtual inertia coefficient and a damping factor to achieve an optimized response to the contour conditions of the power converter.

[0025]The electromechanical control loop comprises a PLC (“power loop controller”) that receives the difference between the input power (power delivered to the converter by the primary source) and the power delivered to the grid, and a series of parameters, such as natural freque...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a virtual controller of electromechanical characteristics for a static power converter that includes a PLC (23) (power loop controller), which receives, at the input thereof, the power difference (ΔP) between the input power (Pin) (power delivered to the converter by the primary source) and the power delivered to the grid (Pelec) and is able to modify online the parameters of the virtual inertia coefficient and the damping factor as a function of the desired response and of the grid conditions for different frequency ranges.

Description

OBJECT OF THE INVENTION[0001]The present invention relates to a controller of the virtual electromechanical characteristic for static power converters that, connected to the electric grid, allows the control of the power injected thereto. The main application of this invention is distributed generation plants and especially in renewable energy plants such as wind and photovoltaic energy.BACKGROUND OF THE INVENTION[0002]The sources of renewable energy, mainly wind power plants (WIN) and photovoltaic (PH) power plants, have ceased to be a marginal resource in the generation of electricity. The generators of PH plants use power converters to connect to the electric grid. These power converters, also known as inverters, inject current to the voltage of the grid to supply power to the same. In normal operating conditions, the PH inverters inject single-phase o tri-phase sinusoidal currents to the grid, depending on the power range of the generator. Normally, the currents injected to the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
06 Mar 2014
Publication
US20140067138A1
IPC
G05B13/04
CPC
H02J3/381; G05B13/04; H02P2101/15; H02P9/10
Inventors
RODRIGUEZ CORTES, PEDRO; GARCIA, JOSE IGNACIO CANDELA